Publisher: naming disparity - trackable state

[AndyTWF]

In Swift, we have a generic called "TrackableState", which contains information around skipped locations, retry count etc. The same generic in Android is called "LocationsPublishingState" which is possibly more accurate.

In Android we have an enum called "TrackableState" which specifies whether the trackable is considered online, offline, failed etc. By comparison in swift this is called "ConnectionState".

For parity, we should make these consistent.

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-3393

[lawrence-forooghian]

Didn't realise we had this issue! #624 addresses this.